Field file 22 · Museum · Idaho
Old Idaho Penitentiary
Boise, Idaho · Treasure Valley · Territorial prison
Record
Why it matters
A territorial-era prison complex of sandstone cell houses, walls, yards, and exhibits spanning more than a century of confinement.
Field note
The preserved architecture is blunt enough. Let the records and cells carry the story instead of chasing paranormal claims.
Evidence line
This file is marked Documented because the place and its history are supported by the linked authoritative source. Practical details were last checked in July 2026. Conditions change. Check the primary source before leaving home.
Access
How to approach it lawfully
Historic stairs and confined spaces. Follow posted access limits.
- Access status
- Ticketed. Public access with paid admission or a required ticket. Recorded as: State historic site.
- Reservation
- No reservation requirement recorded. Confirm with the official source.
- Seasonality
- No seasonal limit recorded. Hours still change; check before traveling.
Practical details last checked July 2026. Conditions change. Check the primary source before leaving home.
Plan the stop
What to plan for
- Time
- 1 to 3 hours
- Cost
- Admission applies (Fee or pass)
- Terrain
- Not recorded in this file. Check the official source.
- Mobility
- Historic stairs and confined spaces.
- Parking
- Not recorded in this file. Check the official source.
- Weather
- Not recorded in this file. Check the official source.
Directions to the public entrance Opens Google Maps with these coordinates. The provider sees them under its own privacy policy. Confirm the entrance against the official source first.
Record
Sources
- Primary sourceIdaho State Historical Society , opens in a new tab
Sources are summarized in the Atlas's own words and checked on the dates shown. See the methodology, or send a correction.
Road file
Carry it forward
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Book the tour, not the trouble.
No partner link on this file. Use the official source for tickets and tours. How partner links work.